同组异序DNA序列

Editors note: This is the third episode of four-part series on verb tenses. Be sure to listen to part one and part two first. For VOA Learning English, this is Everyday Grammar. Today we are going to talk about the perfect verb tenses. Perfect tenses

发表于:2018-11-27 / 阅读(438) / 评论(0) 分类 2016年VOA慢速英语(十二)月

Section A [00:01.23]1. M: I haven't decided which subject to major in [00:04.96]physics or chemistry. [00:07.76]W: It isn't easy to choose,is it? [00:10.21]Q: What does the woman mean? [00:13.87]2. W: The map shows that this street goes downtown. [00

发表于:2018-11-29 / 阅读(222) / 评论(0) 分类 决胜四级听力必备

Section A [00:01.54]1. M: My grandpa died in 1978. I was 18 years then. [00:08.20]W: That means he would be 76 if he were alive. [00:11.49]Q: How old was his grandpa when he was dead? [00:14.45]2. M: Why are you going so fast? [00:17.53]Where are you

发表于:2018-12-01 / 阅读(272) / 评论(0) 分类 决胜六级英语听力

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Its the time of year to take a look backand thats just what the journal Science did as they listed their most important breakthroughs of 2008. At the v

发表于:2018-12-02 / 阅读(161) / 评论(0) 分类 Scientific American(十二)月

图片 by Jason Marshall Its not often someone suggests that knowing some math could make you the life of the party, but thats exactly what Im going to do. Yes, a properly timed delivery of a few fun facts about the famed Fibonacci sequence just migh

发表于:2018-12-07 / 阅读(158) / 评论(0) 分类 数学英语

[ti:UNIT 2 DNA Lesson 10 What Is DNA?] [0:02.300]UNIT 2 第二单元 [0:03.936]DNA [0:06.098]Lesson 10: 第10课: [0:07.918]What Is DNA? 什么是DNA? [0:10.668]THINK ABOUT IT! 想一想! [0:12.400] Do you and the students near you look the sam

发表于:2018-12-10 / 阅读(190) / 评论(0) 分类 河北教育初中英语(初中起点)九年级下

[ti:UNIT 7 Enjoy Your Hobby Lesson 56:Unit Review] [0:01.051]Unit 7 [0:02.631]Enjoy Your Hobby [0:04.894]Lesson 56: [0:06.943]Unit Review [0:08.907]I. [0:10.231]Building Your Vocabulary [0:12.963]A. [0:14.500]Fill in each blank with the proper word o

发表于:2018-12-10 / 阅读(169) / 评论(0) 分类 河北教育初中英语(初中起点)八年级上

发表于:2018-12-12 / 阅读(103) / 评论(0) 分类 医务英语

This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? The human genome was sequenced, and in the process of moving that forward the technology that was developed was incredible. And because of their efforts in human genome,

发表于:2018-12-24 / 阅读(208) / 评论(0) 分类 Scientific American(十)月

Describing Order and Sequence Patrick: Okay, your first task is to put all of these files in order. Maya: Wow, there must be hundreds of files in this storeroom. How am I supposed to organize them? Patrick: Create a basic filing system. Put things in

发表于:2018-12-27 / 阅读(153) / 评论(0) 分类 2014年ESL之商务英语

图片 by Jason Marshall Some math is functional. Some math is fun. And some math is simply stunning. If that last description sounds improbable to you, then today just might change your mind. Because now that weve covered enough ground, were going t

发表于:2019-01-02 / 阅读(247) / 评论(0) 分类 数学英语

1177 、 程序;程序 program 1178 、 稀释剂;天拿水 thinner 1179 、 等角投影 isometricprojection 1180 、 等角投影纸;斜格纸 isometricgridpaper 1181 、 等角投影图;均角

发表于:2019-01-03 / 阅读(111) / 评论(0) 分类 英文名句短语

This is Scientific American's 60-Second Science. I'm Steve Mirsky, got a minute? Neandertals were our closest relatives. And now we know a lot more about them. Because researchers have for the first time sequenced a complete Neandertal genomethat of

发表于:2019-01-08 / 阅读(172) / 评论(0) 分类 Scientific American(八)月

This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? Robin Williams thought that the platypus was cobbled together by an inebriated deity: Lets take a beaver. Lets put on a ducks bill. Now we know how weird the platypus is

发表于:2019-01-08 / 阅读(166) / 评论(0) 分类 Scientific American(五)月

由于传统的英语教学里面不涉及小作文的内容,所以雅思写作的小作文部分一直是很多同学的软肋。不会说名称,不知如何分析对比,即使有思路却不知如何表达,成为很多同学的问题。下面

发表于:2019-01-18 / 阅读(165) / 评论(0) 分类 雅思英语

古埃及金字塔是奴隶制帝王的陵墓,最宏大的当为吉萨三座大金字塔。塔基呈方形,每边长230米,高146米,用230余万块巨石(每块平均重达2.5吨)垒成,国王墓室用一块400吨重的石板垒成。整体规

发表于:2019-02-01 / 阅读(127) / 评论(0) 分类 阅读空间

BEIJING, Aug. 22 (Xinhuanet) -- Researchers have discovered how a human egg captures an incoming sperm for fertilization, paving the way to help couples suffering from infertility, according to media reports on Monday. An international team of resear

发表于:2019-02-08 / 阅读(173) / 评论(0) 分类 英语新闻

Listen to the schedule of a business trip. Fill in numbers l-8 to point out the sequence of the schedule. I'm leaving for Milan on the 7th of June. l'II arrive there on the 8th evening at about 7:OOpm. Then, l'II take a shuttle bus to the hotel. On t

发表于:2019-02-17 / 阅读(135) / 评论(0) 分类 英语听力练习题

Listen to the dialogues and write the correct sequence of l-6 as mentioned in the dialogues. A:How do I search books from the computer? B:First, key in your PIN number. Then, it goes to the Library's Homepage. Then, you can choose any way you want to

发表于:2019-02-17 / 阅读(113) / 评论(0) 分类 英语听力练习题

Thank you for being here,Fareed.Nice to have you on the show. 多谢你抽空前来 法里德 很高兴你能来上节目 Let's get started first with your background.I do think I know a lot about you. 首先聊聊你的背景 我觉得我很了解你

发表于:2019-02-23 / 阅读(159) / 评论(0) 分类 柯南脱口秀
学英语单词
acetate-base film
active memory cell
adrenocholinergic
adulterants
air and fuel mixture
aircraft failure
Albert crepe
aluminum-conductor-alloy-reinforced
aprophen
at priority call
auctorum
beach umbrella
bellowsgauge
biogeoclimate zone
bishnoi
blue-painted
buffer spring
by pass channel
byams
Calavo Gardens
catalytic monopropellant hydrazine system
Chenini de Gabès
cila
coarse radio location
cold as charity
Colwyn Bay
content delivery services
data sanitization
dismalest
dorsal carpal ligament
drawing camera
dry farmland
duct piece
electroclash
evily
exasperater
Falcó, C.
fishskin
five pointer
flange wheel
forward-sequence component
four-colour half tone printing
Free Democratic Party
golden BB
goots
Guayatayoc, L.de
heart (or blood heart)
higher ambient transistor
honkingly
humpier
inoculate garden legumes
instantaneous acceleration
interpreting subroutine
iron earth
iztapalapa (ixtapalapa)
jointly-owned
knocking-bucker
legal tare
lipcolor
Lomatogonium saccatum
lugol solution
made your appearance
mechanical working stress
medical-marijuana
Mercuranine
metal inclusion
Mini Moke
misintended
module origin
non-conformings
nose pad
Ocracoke I.
omnidirectional range station
open dwarf larva
pentacron
permanent community
Pristen'
radioisotope hydraulics
reitzensteins
remote-access terminal
repaganize
rhaphidophorids
rimples
scilent
spool creel
stamp washer
stickseed
stinking horehounds
thermoscopic bar
thin disc technique
thrailkill
transplutonicum isotope
Treasury Direct
Tri-tuberculate
tryptamine hydrochloride
tuntse
two pairs of satellite chromosome
Vert, C.
Volovskiy Rayon
whittiers
wood-tick
world organisation